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Marques-Iasi, Yves Santini
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article
Thickness and marking quality of different occlusal contact registration strips
Abstract
Made available in DSpace on 2015-03-19T16:20:28Z (GMT). No. of bitstreams: 0 Previous issue date: 2014-12-01Bitstream added on 2015-03-19T16:29:20Z : No. of bitstreams: 1 S1678-77572014000600516.pdf: 2130663 bytes, checksum: e6e83a32b5a40756bac3062d22f899b9 (MD5) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) ObjectiveEvaluate the thickness and the marking quality of different occlusal contact registration strips (OCRS) and a possible correlation between them. Material and MethodThe following OCRS were selected: Accufilm II, BK20, BK21, BK22, BK23, BK28, and BK31. The thickness was measured in three points of the OCRS with an electronic measuring device (TESA), and the mean was calculated. To produce the marks on the strips, composite resin specimens were adapted to a universal testing machine (Versat 2000) with 40 kgf load cell at a speed of 1.0 mm/min. The mark images were photographed with a stereoscopic microscope (Stemi SV11) and processed and analyzed by the 550-Leica Qwin® analyzer. ResultValues (μm) found in the 1st and 2nd thickness measurements were: Accufilm II - 16.4 and 14.2; BK20 - 10.0 and 8.1; BK21 - 9.5 and 8.0; BK22 - 9.7 and 8.7; BK23 - 9.8 and 7.9; BK28 - 12.8 and 10.0; and BK31 - 8.4 and 8.0, respectively. The mean (mm2) values found in the mark areas were: Accufilm II - 0.078; BK20 - 0.035; BK21 - 0.045; BK22 - 0.012; BK23 - 0.022; BK28 - 0.024; and BK31 - 0.024. The results were submitted to the Kruskal-Wallis (p<0.05) and Pearson’s correlation tests. ConclusionOnly in the 2nd measurement, the OCRS thickness observed was similar to the value indicated by the manufacturers; the Accufilm II and the BK28 strips showed the better marks; and no correlation was found between the thickness and the marking area. São Paulo Univ. Estadual Paulista Science and Technology Institute School of Dentistry University of Taubaté Department of Dentistry Universidade Estadual Paulista Science and Technology Institute School of Dentistry Universidade Estadual Paulista Science and Technology Institute School of Dentistry